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Is any place I can download Treebank of English phrases for free or less than $100? I need training data containing bunch of syntactic parsed sentences (>1000) in English in any format. Basically all I need is just words in this sentences being recognized by part of speech.
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1. It contains 36 POS tags and 12 other tags (for punctuation and currency symbols). ...
Applications. From a computational linguistics perspective, treebanks have been used to engineer state-of-the-art natural language processing systems such as part-of-speech taggers, parsers, semantic analyzers and machine translation systems. Most computational systems utilize gold-standard treebank data.
The Penn Treebank, or PTB for short, is a dataset maintained by the University of Pennsylvania. It is huge — there are over four million and eight hundred thousand annotated words in it, all corrected by humans.
Here are a couple (English) treebanks available for free:
American National Corpus: MASC
Questions: QuestionBank and Stanford's corrections
British news: BNC
TED talks: NAIST-NTT TED Treebank
Georgetown University Multilayer Corpus: GUM
Biomedical:
NaCTeM GENIA treebank
Brown GENIA treebank
CRAFT corpus
See also Wikipedia for a huge list.
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NLTK (for Python) offers several treebanks for free.
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